How many molecules of pyruvic acid are produced when a single glucose molecule undergoes glycolysis?(1 point) Responses 2 2 4 4 1 1 0

When a single glucose molecule undergoes glycolysis, it produces 2 molecules of pyruvic acid. Therefore, the correct response is **2**.

Order the atoms involved in cellular respiration from most prevalent to least.(1 point) Responses H, C, O H, C, O H, O, C H, O, C O, H, C O, H, C C, H, O

The most prevalent atoms in cellular respiration, in order from most prevalent to least, are **H, C, O**. Therefore, the correct response is **H, C, O**.

How many CO2 molecules are produced when three glucose molecules undergo cellular respiration?(1 point) Responses 18 18 12 12 3 3 6

When one glucose molecule undergoes cellular respiration, it produces 6 molecules of carbon dioxide (CO2). Therefore, when three glucose molecules are metabolized, it would produce:

\[ 3 \text{ glucose} \times 6 \text{ CO2/glucose} = 18 \text{ CO2} \]

So, the correct response is **18**.

Suppose cellular respiration occurs inside an insulated, sealed container. How does the container’s weight change during the reaction?(1 point) Responses decreases decreases increases increases fluctuates fluctuates stays the same

During cellular respiration, glucose and oxygen are converted into carbon dioxide, water, and energy. Although gas (like CO2) is produced and might escape a regular open system, in a sealed, insulated container, all reactants and products remain inside the container. Thus, the total mass of the container and its contents remains unchanged.

Therefore, the correct response is **stays the same**.

How would a 3D model of glucose differ from the formula model?(1 point) Responses A 3D model shows the number of each type of atom, but the formula model does not A 3D model shows the number of each type of atom, but the formula model does not A formula model shows which atoms are larger but the 3D model does not. A formula model shows which atoms are larger but the 3D model does not. A formula model shows size of the glucose molecule, but the 3D model does not. A formula model shows size of the glucose molecule, but the 3D model does not. A 3D model shows how the different atoms are arranged, but the formula model does not. A 3D model shows how the different atoms are arranged, but the formula model does not.

The correct response is: **A 3D model shows how the different atoms are arranged, but the formula model does not.**

A molecular formula provides the types and quantities of atoms in a molecule (like C6H12O6 for glucose) but does not convey the spatial arrangement of those atoms. A 3D model, on the other hand, represents the actual structure and how the atoms are positioned in three-dimensional space.